The small northern town holds great value for IS because of a prophecy of an apocalyptic battle, and features heavily in its propaganda.

The advance on Dabiq is part of a wider offensive by Syrian rebel groups.

Ahmed Osman, the commander of the Sultan Murad rebel group, told Reuters news agency that the group had also recaptured the neighbouring village of Soran.

The Syrian Observatory for Human Rights said 1,200 IS fighters had been brought in to defend Dabiq.

In other Syria developments:

At a meeting of foreign ministers in London, US Secretary of State John Kerry said new sanctions were being considered against Russia and Syria because of their actions in the city of Aleppo

There are reports of at least one person dead and dozens injured in an explosion on the edge of the makeshift Rukban camp, where some 75,000 Syrian refugees are trapped on their country's border with Jordan

Analysis: Sebastian Usher, BBC Arab affairs editor

The battle for Dabiq has been building for weeks - with one village after another being seized from IS by rebel fighters backed by Turkish airstrikes.

In the end, it seems to have fallen swiftly after the announcement of the final assault on Saturday.

Strategically, it's not a major prize. But IS has embraced it as a symbol of its apocalyptic vision of all-out confrontation with its enemies.

The town is named in one Hadith - or saying by the Prophet Mohammed - as the site of the climactic battle between Muslims and non-Muslims before the end of the world. The group named its online magazine after it, but has downplayed its significance recently, saying this battle is not the epic that was prophesied.

A commander of one rebel group, the Hamza Brigade, told the Associated Press that resistance from IS was "minimal".

Saif Abu Bakr said IS withdrew towards the larger town of Al-Bab to the south.

He said about 2,000 rebel fighters were involved in the offensive.

They were supported by Turkish tanks and artillery, and airstrikes from international coalition warplanes.

Image copyrightAPImage caption
Dabiq is now under full rebel control, Turkey says

Dabiq is just 10km (six miles) from the border with Turkey.

In August, Turkey launched an offensive to clear the border region of militants, meaning both IS and Kurdish rebels fighting IS.